Spill-proof container

ABSTRACT

A container includes a bowl having a bowl interior space for holding solid material and a bowl opening for accessing the interior space of the bowl from an exterior of the bowl. The container also includes a bowl support having a bowl support interior space within which the bowl is located and a bowl support opening for accessing the interior space of the bowl support from an exterior of the container. The bowl is biased toward an upright orientation of the bowl independent of the rotational orientation of the bowl support. The bowl support opening overlies the bowl opening when both the bowl and the bowl support are in respective upright orientations, and the bowl support covers the bowl openings when the bowl support is tilted.

The present application is a U.S. continuation of, and claims priority under 35 U.S.C. §120 to, U.S. nonprovisional patent application Ser. No. 10/834,631, filed Apr. 29, 2004, which published as U.S. patent application publication no. US 2005/0242100 A1, which is incorporated by reference herein.

BACKGROUND

All of the material in this patent document, including the computer program listing, is subject to copyright protection under the copyright laws of the United States and other countries. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in official governmental records but, otherwise, all other copyright rights whatsoever are reserved.

The present invention relates to a spill-proof container, and in particular to a particulate material container with an access opening that closes when the container is tipped from its normal upright position, preventing contents spillage.

Numerous spill-proof containers are described in the prior art for holding drinks or other liquids. When designed for use by children, such containers are commonly referred to as “sippy” cups. Spill-proof containers for liquids prevent liquid spillage by using a tubular member that extends into a larger outer container for holding a reservoir of liquid, or by using a valve arrangement adjacent the discharge opening, which is often sized to fit the user's mouth. These containers are not suitable for use in holding particulate material, whether or not a liquid is also present, since it is necessary for the user to have access, either by hand or a utensil, to the particulate material in order to remove the material from the container.

Several containers are also described in the prior art for use in holding particulate materials, or a combination of a particulate material and a liquid. These containers purport to hold particulate material in an easily accessible manner, while preventing discharge of material from the container when the container is tipped or inverted.

For example, U.S. Pat. No. 4,714,174 to Williams, describes a spill-proof container for dry granular foodstuffs, such as cereal, which is comprised of an outer container into which the foodstuff is placed, and a smaller, open-bottom container that extends into the outer container. A cover extends over the space between the outer and inner containers. The user reaches through the inner container into the outer container to remove the foodstuff. If the container is tipped, the foodstuff is held within the space between the containers. Due to the configuration required to prevent spillage, the outer container can only be partially filled, and access is cumbersome, since only the material immediately beneath the inner container is accessible.

U.S. Pat. No. 5,366,103 to Abernathy et al. also describes a cereal bowl comprised of a smaller container within a larger container. The space between the upper edges of the containers is open. In the event the bowl is tipped, the cereal in the inner bowl spills into the outer bowl. This alternative has no provision for recovery of the spilled material within the outer bowl and effectively requires discarding the cereal in the event of spillage.

U.S. Pat. No. 6,656,514 to Tubbs and U.S. Pat. No. 6,176,384 to Voloshin describe containers for food items, such as cereal flakes, crackers, cookies, and the like, in which the top is covered with a cap having a plurality of flexible, pie-shaped flaps that together form a spill-proof cover. The flaps are flexed in order to access the container contents. The flaps hinder access and prevent viewing of the contents.

There remains a need for a spill-proof container for particulate material that enables easy access to and viewing of the material during normal container usage, but which will prevent spillage of the material if the container is tipped. Preferably, the material within the container is not discharged from its original storage location and is recoverable when the container is returned to the upright position.

SUMMARY

Generally, the present invention addresses this need by providing a spill-proof container for particulate material that is comprised of a bowl with an access opening, and a bowl support for holding the bowl so that the bowl remains in an upright orientation and the access opening is covered by a part of the bowl support when the container is tipped. The support includes an open-top chamber in the shape of a truncated sphere, i.e., a spherical chamber with a slice cut off of the top to form the access opening. The normally upright, open-top bowl is freely rotatable within the chamber relative to the support, with the support and bowl openings being aligned to permit access to the bowl interior when the support and bowl are both in their upright orientation and unaligned to close the bowl access opening when the outer section is not in the upright position.

Preferably, the support includes a base section with an upwardly oriented hemispherical chamber, and a top section with a downwardly oriented truncated hemispherical chamber and an upper access opening formed by truncation at the top of the hemisphere. The base and top sections are releasibly joined so that the upper and lower hemispherical openings form a truncated spherical bowl receiving chamber. The access opening in the top section is preferably circular with a given diameter less than the diameter of the chamber. One of the hemispherical sections may include a projection around its edge to releasibly attach the sections.

The bowl section of the spill-proof container has an outer wall that is generally in the shape of a truncated sphere, with the truncation forming the access opening into the bowl interior. The bowl has a diameter approximately equal to the chamber diameter, and is freely rotatable within the support chamber. The shape of the interior is not critical to the invention. For maximum volume, however, the interior of the bowl will also be in the shape of truncated sphere.

The bowl should be normally oriented to its upright position, i.e., the center of gravity of the bowl should be below the bowl midpoint, so that the bowl will remain in its upright position when the support is tilted. The design of the bowl or an added weight can be used to ensure that the center of gravity is below the midpoint.

In order to reduce the friction between the outer wall of the bowl and the chamber wall, a part of the bowl wall may be spaced from the chamber wall so that only selected areas of the bowl wall make frictional contact with the chamber wall during rotation of the bowl. Spacing may be achieved by decreasing the diameter of at least a section of the bowl wall or by increasing at least a section of the chamber wall.

For example, the bowl wall may include a continuous annular upper section extending around the bowl access opening, a lower section across the bottom of the bowl, and a continuous middle wall section extending around the middle of the bowl between the upper and lower sections. The middle section may have a diameter less than the upper and middle sections. Thus, when the support is tipped and rotates relative to the bowl, which remains in an upright position, the frictional contact will only be between the chamber wall and the bowl upper and lower wall sections, substantially reducing friction and facilitating freedom of rotation.

Alternatively, the diameter of the bowl wall may be uniform while the support chamber diameter is greater in some areas than in others. For example, the chamber wall may include a continuous annular upper section extending around the chamber access opening, a lower section across the bottom of the chamber, and a continuous middle wall section extending around the middle of the chamber between the upper and lower sections. The middle section may have a diameter greater than the upper and middle sections. Thus, when the support is tipped and rotates relative to the bowl, which remains in an upright position, the frictional contact will only be between the bowl wall and the chamber upper and lower wall sections, again substantially reducing friction and facilitating freedom of rotation.

Other configurations to achieve the reduced friction will be apparent to one skilled in the art after reading the present description. For example, either the bowl wall or chamber wall may be “dimpled” with a plurality of projections, with the ends of the projections having the diameter of the opposing wall.

When used, a solid material is placed in the bowl. For example, the solid material may be a particulate material such as a foodstuff, e.g., cereal, cookies, candy, etc. Alternatively, the foodstuff may be an animal food, such as dog or cat food. The container may also be used for non-food materials, such as parts, supplies, etc. Due to the relatively wide access opening, the material within the bowl is easily viewable, and can be reached by hand or a utensil.

In the event that the base is tipped from its upright position, either partially or completely, the bowl will remain in the upright position due to its center of gravity being below its midpoint. Thus, the chamber and bowl access openings, which are normally in alignment to provide access to the bowl interior, will become nonaligned due to rotation of the chamber access opening to the side of the bowl access opening, and the bowl access opening will be covered by a part of the chamber wall. Depending on the tolerance between the chamber and bowl walls, the closure of the bowl access opening can prevent spillage of liquids in addition to spillage of any solid material content.

Thus, the container of the present invention is suitable for a variety of end uses. For example, the container can be used as a food container by children, invalids and others who may accidentally tip the container over during eating. The container can also be used as a pet food container, or as a holder for any type of solid material that might normally spill when the container is tipped over.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the exterior of a container of the present invention.

FIG. 2 is a sectional side view of a preferred embodiment of the container in the upright position.

FIG. 3 is a sectional side view of the container of FIG. 2, with the support partially tipped.

FIG. 4 is a sectional side view of the container of FIG. 2, with the support tipped to approximately 90.degree. for its normally vertical, upright orientation.

FIG. 5 is an alternative embodiment of the invention in which the chamber wall has an enlarged diameter around its center section.

DETAILED DESCRIPTION

In the following description, terms such as horizontal, upright, vertical, above, below, beneath, and the like, are used solely for the purpose of clarity in illustrating the invention, and should not be taken as words of limitation. The drawings are for the purpose of illustrating the invention and are not intended to be to scale.

As shown in FIGS. 1-4, a preferred embodiment of container, generally 10, is comprised of a bowl support formed of base section 12 that includes an upwardly oriented hemispherical chamber and top section 14 that includes a downwardly oriented truncated hemispherical chamber having an upper circular access opening 16. Base section 12 and top section 14 are releasibly joined by flange 18 to form a truncated spherical bowl-receiving chamber defined by chamber wall 20. The diameter of access opening 16 is less than the diameter of the chamber, and is preferably from about 25 to about 85% of the diameter of the chamber.

Container 10 further includes bowl 30 having an outer wall 32 that is generally in the shape of a truncated sphere, and an interior chamber 34 that is also in the shape of a truncated sphere but of a smaller diameter than the bowl outer wall 32. Bowl 30 includes an access opening 36 having a diameter approximately equal to the diameter of access opening 16. Outer wall 32 is comprised of continuous annular upper section 38 extending around the periphery of opening 36, a lower section 40 across the bottom of bowl 30, and a middle or intermediate section 42 extending around bowl 30 between upper section 38 and lower section 40.

In order for bowl 30 to remain in its upright, vertical orientation regardless of the orientation of the support, the center of gravity of bowl 30 should be below the center point of bowl 30. As shown in the preferred embodiment, this is achieved by molding weight 44 into the bottom of bowl 30.

As shown in FIGS. 2-4, the diameters of upper section 38 and lower section 40 are approximately equal to the diameter of chamber wall 20, while the diameter of middle section 42 is less than the diameter of chamber wall 20. As illustrated in the drawings, bowl 32 is shown spaced slightly from chamber wall 20 to better illustrate the invention. When actually constructed, however, the diameters of the two walls are substantially the same so long as there is no frictional binding between the walls. Thus, when the support is tipped and rotates relative to bowl 30, which remains in an upright position, the frictional contact will only be between the chamber wall 20 and bowl upper and lower wall sections 38 and 40 respectively, substantially reducing friction and facilitating freedom of rotation.

Alternatively, as shown in the embodiment illustrated in FIG. 5, the diameter of bowl wall 50 may be constant while the diameter of support chamber wall 52 is greater in some sections than in others. As illustrated in FIG. 5, the chamber wall 52 includes a continuous annular upper section 54 extending around chamber access opening 56, a lower section 58, and a continuous middle wall section 60 extending around the middle of chamber wall 52 between the upper section 54 and lower section 58. Middle section 60 has a diameter greater than upper section 54 and lower section 58. Thus, when the support is tipped and rotates relative to the bowl, which remains in an upright position, the frictional contact will only be between bowl wall 50 and upper and lower wall sections 54 and 58, again substantially reducing friction and facilitating freedom of rotation.

Certain modifications and improvements will occur to those skilled in the art upon a reading of the foregoing description. It should be understood that all such modifications and improvements have been deleted herein for the sake of conciseness and readability but are properly within the scope of the following claims. 

1. A container, comprising: (a) a bowl having, (i) a bowl interior space for holding solid material, and (ii) a bowl opening for accessing the interior space of the bowl from an exterior of the bowl; (b) a bowl support having, (i) a bowl support interior space within which the bowl is located, and (ii) a bowl support opening for accessing the interior space of the bowl support from an exterior of the container; (c) wherein, (i) the bowl is biased toward an upright orientation of the bowl independent of the rotational orientation of the bowl support, (ii) the bowl support opening overlies the bowl opening when both the bowl and the bowl support are in respective upright orientations, and (iii) when the bowl is in an upright orientation and the bowl support is rotated to an upside down orientation, the bowl remains in the upright orientation and the bowl support covers the bowl opening precluding access therethrough.
 2. The container of claim 1, wherein, when the bowl is in an upright orientation and the bowl support is rotated from an upright orientation, the bowl is configured to remain in the upright orientation.
 3. The container of claim 1, wherein, when the bowl is in an upright orientation and the bowl support is not in an upright orientation, the bowl support covers at least a portion of the bowl opening.
 4. The container of claim 1, wherein, when the bowl is in an upright orientation and the bowl support is rotated to an upside down orientation, the bowl remains in the upright orientation and the bowl support covers the bowl opening precluding access therethrough.
 5. The container of claim 1, further comprising particulate material contained within the bowl interior space and, (i) when both the bowl and the bowl support are in respective upright orientations, the particulate material within the bowl interior space is accessible by hand through the bowl support opening and the bowl opening, and (ii) when the bowl support is moved into an upside down orientation and the bowl remains in the upright orientation, the bowl support covers the bowl opening and the particular material is prevented from spilling out of the bowl interior space.
 6. The container of claim 5, wherein, when the bowl support is returned to an upright orientation from an upside down orientation with the bowl in an upright orientation, the particulate material within the bowl interior space is again accessible by hand through the bowl support opening and the bowl opening.
 7. The container of claim 1, wherein the interior space of the bowl may be viewed, from the exterior of the bowl support, through both the bowl support opening and the bowl opening, when both the bowl and the bowl support are in respective upright orientations.
 8. The container of claim 1, wherein rotational orientation of the bowl is independent of rotational orientation of the bowl support.
 9. The container of claim 1, wherein the bowl support interior space is configured such that the bowl support does not prohibit any rotational orientation of the bowl, the bowl being freely rotatable within the bowl support.
 10. The container of claim 1, wherein the bowl opening is the only opening in the bowl that is dimensioned to permit access by hand to the bowl interior space from the exterior of the bowl.
 11. A container, comprising: (a) a bowl having, (i) a bowl interior space for holding solid material, and (ii) a bowl opening for accessing the interior space of the bowl from an exterior of the bowl; (b) a bowl support having, (i) a bowl support interior space within which the bowl is located, and (ii) a bowl support opening for accessing the interior space of the bowl support from an exterior of the container; (c) wherein, (i) the bowl is biased toward an upright orientation of the bowl independent of the rotational orientation of the bowl support, (ii) the bowl support opening overlies the bowl opening when both the bowl and the bowl support are in respective upright orientations, and (iii) the interior space of the bowl support comprises a truncated spherical chamber.
 12. The container of claim 1, wherein the bowl support is comprised of separable upper and lower sections.
 13. The container of claim 1, wherein the bowl opening is the only opening of the bowl that permits access by hand to the interior of the bowl.
 14. The container of claim 13, wherein an exterior shape of the bowl comprises a truncated spherical chamber.
 15. A container, comprising: (a) a bowl having, (i) a bowl interior space for holding solid material, and (ii) a bowl opening for accessing the interior space of the bowl from an exterior of the bowl; (b) a bowl support having, (i) a bowl support interior space within which the bowl is located, and (ii) a bowl support opening for accessing the interior space of the bowl support from an exterior of the container; (c) wherein, (i) the bowl is biased toward an upright orientation of the bowl independent of the rotational orientation of the bowl support, (ii) the bowl support opening overlies the bowl opening when both the bowl and the bowl support are in respective upright orientations, and (iii) the bowl is rotatable, relative to the bowl support, 180 degrees in every rotational direction, and (iv) the interior space of the bowl support comprises a truncated spherical chamber. 